noRenderReturnValue
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Diagnostic Category: lint/correctness/noRenderReturnValue
Since: v1.0.0
Prevent the usage of the return value of React.render.
ReactDOM.render()currently returns a reference to the rootReactComponentinstance. However, using this return value is legacy and should be avoided because future versions of React may render components asynchronously in some cases. If you need a reference to the rootReactComponentinstance, the preferred solution is to attach a callback ref to the root element.
Source: ReactDOM documentation
Examples
Section titled ExamplesInvalid
Section titled Invalidconst foo = ReactDOM.render(<div />, document.body);code-block.jsx:1:13 lint/correctness/noRenderReturnValue ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ Do not depend on the value returned by the function ReactDOM.render().
> 1 │ const foo = ReactDOM.render(<div />, document.body);
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 │
ℹ The returned value is legacy and future versions of React might return that value asynchronously.
Check the React documentation for more information.
Valid
Section titled ValidReactDOM.render(<div />, document.body);